I spent 3 hours hammering it and the pin didn't budge.
Pro-tip - stop after 10 seconds next time, your doing something wrong if it is that hard.
ASONW is a good idea, a local auto machine shop or auto mechanic shop might be able to help if you haven't totally bunged up the hole as well. They may have to drill it out etc depending on what you have done to it with your "hammering"